Date: Thu, 5 Jul 2012 15:38:32 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-9@freebsd.org Subject: svn commit: r238136 - stable/9/lib/libc/gen Message-ID: <201207051538.q65FcWGA081633@svn.freebsd.org>
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Author: kib Date: Thu Jul 5 15:38:32 2012 New Revision: 238136 URL: http://svn.freebsd.org/changeset/base/238136 Log: MFC r237660: Optimize the handling of SC_NPROCESSORS_CONF, by using auxv AT_NCPU value if present. Approved by: re (kensmith) Modified: stable/9/lib/libc/gen/sysconf.c Directory Properties: stable/9/lib/libc/ (props changed) Modified: stable/9/lib/libc/gen/sysconf.c ============================================================================== --- stable/9/lib/libc/gen/sysconf.c Thu Jul 5 15:37:17 2012 (r238135) +++ stable/9/lib/libc/gen/sysconf.c Thu Jul 5 15:38:32 2012 (r238136) @@ -42,6 +42,7 @@ __FBSDID("$FreeBSD$"); #include <sys/resource.h> #include <sys/socket.h> +#include <elf.h> #include <errno.h> #include <limits.h> #include <paths.h> @@ -51,6 +52,7 @@ __FBSDID("$FreeBSD$"); #include "../stdlib/atexit.h" #include "tzfile.h" /* from ../../../contrib/tzcode/stdtime */ +#include "libc_private.h" #define _PATH_ZONEINFO TZDIR /* from tzfile.h */ @@ -585,6 +587,8 @@ yesno: case _SC_NPROCESSORS_CONF: case _SC_NPROCESSORS_ONLN: + if (_elf_aux_info(AT_NCPUS, &value, sizeof(value)) == 0) + return ((long)value); mib[0] = CTL_HW; mib[1] = HW_NCPU; break;
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